What a gorgeous, evocative post, featuring many fruits new to me! I'll see if I can get hold of some hyuganatsu to try. (Fruit in Japan so often, as you mention, seems to be bred to be as large, sweet, and boring as possible; hence my summertime search for the less common, and much more delicious, nectarines over insipid peaches.)
Tha hala fruit is so lovely! It looks more like a geode than something edible.